Library of Congress. Copyright Office. (1985). Copyright basics. Copyright Office, Library of Congress.
Lua i Stíl Chicago (17ú heag.)Library of Congress. Copyright Office. Copyright Basics. Washington, D.C.: Copyright Office, Library of Congress, 1985.
Lua MLA (8ú heag.)Library of Congress. Copyright Office. Copyright Basics. Copyright Office, Library of Congress, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.